'frequent' originates from Latin, specifically the word 'frequentare,' where 'frequent-' meant 'crowded or repeated.' 'Supply' originates from Latin, specifically the word 'supplere,' where 'sub-' meant 'under' and 'plere' meant 'to fill.'

'frequentare' transformed into the Old French word 'frequent,' and eventually became the modern English word 'frequent' through Middle English. 'Supplere' transformed into the Old French word 'soupleer,' and eventually became the modern English word 'supply.'

Initially, 'frequent' meant 'crowded or repeated,' but over time it evolved into its current meaning of 'occurring often.' 'Supply' initially meant 'to fill up,' and this meaning has largely remained the same in modern usage.